Ice-cream freezer.



M. F. EWEN 6I A. L. S. McCURDY.

ICE CREAM FREEZER..

APPLICATION FILED MMIII. I9I4.

1,230,692. Patented June 19, 1917.

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M7 /J I /0'L` M f/ #g/3@ I- TED sTaTEs PA-NT MALCOLM: F. EWEN AND ARTHUR L. S. MGCURDY, OF CHICAGO, ILLINOIS, ASSIGNOBS T LARSEN ICE MACHINE COMPANY (INCJ, OF WILMINGTON, DELAWARE, A- COR- ?oRATIoN QFDELAWABE.

To all whom t may concern:

Be it known L.- S. MCCURDY, subject of the King of Great Britain, and residents of Chicago, 1n

' the county of Cook and State of Illinois,` vhave inventedcertain new and useful Improvements iniIce-Cream Freezers, and do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of thls specification.

15 This invention relates to improvements in freezers for ice cream, ices and the-like, adapted for usein connection with refrigerating apparatus. The improved freezer is intended more p particularly-for use in l connection with domestic refrigerating apparatus, which includesan expansion coil,

'locatedin the usual icecom artment of a refrigerator,- either with or without a brine tank,fanda condenser for supplying thev liquid refrigerant, usually liquld ammonia. .The freezer isfapplicable for use in connection with refrigerating apparatus of either the absorption or compression type.

The invention consists of the matters hereinafter described and more particularly pointed 'out in the appended claim, and its" "various advantages will appear as we pro- L ceed with our specification.

In the drawings:

Figure 1 represents a vertical section ment of our inventiony illustrated in the accompanying drawings, 5 indicates as a whole, an open top box or casing, preferably made of wood. Said box, as shown, 1 s rec#A tangul'ar in cross section, and comprises upright side and end walls 6, 6 and a bottom wall 7. The box 5, as a whole, is supported above the floor by means of a supporting base piece 8, provided with suitable legs 8a.

Specification of Letters Patent.

Application led May 18, 1914.v Serial No. 839,206.

that we, MALCOLM F. EWEN, a citizen of the United States, and ARTHUR Ion-CREAM FnEEzEn.

Patented June 19, 1917.

Centrally located within the box 5 and spaced a suitable distance from the side and end walls 6 and bottom wall'7 thereof, is a minates a short distance below the upper. edge of the box 5, and is there provided with an apertured cover plate 10, the margmaledges of which are attached to the side andend walls 6, 6 of the box 5. The

vspace between the tank 9 and the adjacent walls of said box 5 is packed with suitable insulatlng material 10X.

lcylindrical, open-top tank 9. Said tank ter- Within the tank 9 and closely adjacent to the upright cylindrical wall. thereof is located an inclosure providing a cylindrical jacket chamber, which, as shown herein, is a1 coil of pipe 11. This coil constitutes an expansion jacket chamber and is connected as follows to the condenser of the refrigerating apparatus to which the freezer is connected. Said coil is connected at its lower-or mlet endwith a horizontal pipe 12, which extends throu h the tank 9 and one connected to an upright pipe 13, in which is placed a shut-off'valve 139. The upper or outlet end of the expansion coil 11 is connected '.to a horizontal-pipe 16, connected to 'an upright pipe 16.A The two pipes 1 3 and 16 lare connected, at points vspaced a short 'upright wall ofthe ox 5. The pipe 12 is distance apart, to the main line pipe 14 leading from thecondenser of the refrigerating v.apparatus to the main expansion coil thereof (not shown). A shut-offv valve 17 is -placed in the pipe 14, between the points of its connection to the pipes 13 and 16.

As before stated, the upper end of the tank 9 has an aperturedplate 10. The opening in said plate is concentrically arranged with reference to the said tank 9 and the coil 11 therein, and is of a diameter slightly lessthan the inne-r diameter of said coil 11. A depending flange 10a is formed in the plate about the said opening.y

20 (see lFig. 2) indicates a thin sheet metal; cylindrical', open top can, such las vused'in icecream freezers at the present time. Said can is provided with an annular shoulder 21 near its upper open end, which` j shoulder when the can is in place-withinl the tank 9, engages the adjacent margin of the plate 10, surrounding the opening therein. The bottom wall of the can 20 is provided with a plurallty lofv lugs. 22, which coact lwith a plurality'of socket plates 23, -fixed -to 1|the box 5.

the bottom wall of the tank 9, in a manner preventing rotation of the can 20 while in operative position within said tank 9. The upper end of the can 20v is closed by means of a removable cover 24, having the usual gear mechanism operated by means of a crank handle 25 from without the box 5,

for imparting the proper motion to the agitator26 within the' can 20. A clip or latch member 27 is attached to one of the side Walls of the box 5 to assist in holding the cover 24 in position upon the can 20, in a familiar manner. A

Within the tank 9 is placed a' small quaIl- 'tlty of brine 28 or other liquid adapted to provide a good conductor between the coil andthe can 20. The amount of conducting liquid should be such that when the can is placed within the tank 9, the level of the same will rise to almost the top of the tank 9, and but a thin film of brine will surround the sides and bottom of thecan. Such displacement of the brine is shown in Fig. 2.'

These parts should be so proportioned that there will be only sufficient brine to form a liquid seal between the can and the eXpansion coil.

Should it be desired `to Withdraw the brine 28 from the tank for the purpose of cleaning said tank or exchanging the brine therein the manner before described, preventing rotation of the same. The removable cover with its beater operating gear is then placed in position and held therein 'by means of the clip or latch 27. This act of placing the can 20 Within the tank 9, displaces the brine 25 within the tank 9, cansingjhe level thereof to rise as'before described so that' only a thin film of brine separates the can 20 from the coil 11. The valve 17 in the refrigerating line pipe- 14 is closed and the valve 13a in the pipe 13 is opened; the refrigerant expandi'ng therethrough into and through the coil 11, and then through the pipe 16, back into the line pipe 14, whence it passes on to do whatever more work as a cooling agent it was intended for, The refrigerant in its passage through the coil will. take up the heat of the brine, said brine in'l turn absorbing the heat of the contents in'the can 20, which are agitated byy means of the beater Within the can. After the ice cream is frozen to the proper consistency, the can may be withdrawn and the frozen ice cream removed therefrom. After. the can 2O has been removed, the level of the brine again drops to the level shown in Fig. 1. The valve 13a in the pipe is then closed and the valve 17 in the refrigerating line pipe 14 is again opened and the flow of refrigerant is then straight through the pipe 14.

It is apparent thatk when the refrigerant is passing through the coil, the operation of the main apparatus system is in no way interfered with, said coil 11 and the pipes 13 and 16 forming a by-pass in the system.

While in describing our invention We have referred to certain details of arrangement and construction, we do not wish to be limited thereby except as may be pointed out 1n the appended claim.

We claim as our invention:

An ice cream freezer for use with refrigerating apparatus, comprising an insulated container, means providing an expansion jacket chamber within said container,c a can removably supported in said container within said expansion chamber, said container and said can by their side and bottom walls defining a`space about the sides and bottom -of said can adapted to receive a sufficient quantity of liquid to form a thin film or seal between said expansion chamber and sald can, a plate having an opening for the insertion of the can, fixed to the top of sald container andforming the top wall for said jacket chamber, said can being adapted to close the opening in said plate, 1nlet and outlet conduits connected lto `said expansion chamber, and means for controlling the How therethrough. n

In testimony, that we, clalm the foregoing as ourinvention we affix our signatures in the presence of two Witnesses, this 25th d ay of April A. D. 1914.

MALCOLM F. EWEN. ARTHUR L. s. MCCURDY.

Witnesses:

T. H. ALFREDS, KARL W. DOLL. 

